Materials:
Steel (steel
pipe of steel sheet):
1
Main
structure(column):use Q345 steel, and its quality fit for the standard of Low
Alloy High Strength Steel Structure(GB1594-94). The materials meet the 5 basic
requests.
2
Sub-structure
use Q235 steel, and its quantity fit for the Common Carbon Steel Structure
Technology Standard (GBGB700-88).
3
All
the steel should fit for the extreme amount of sulfur and phosphorus, the
welding steel should fit for the extreme amount of carbon.
4
The
ratio of winding and stretching strength should be smaller than 0.85.
5
The
steel should have plenty room for winding, the stretching ratio should be
greater than 20%
6
Great
welding and tensile performance.
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